Turn on the first for one min and then turn it off.7 j# N- x) y$ k! n5 z3 b2 z' B
Turn on the 2nd for five min and then turn it off. + }, w9 b& [4 XTurn on the 3rd and leave it on.0 J5 K% P4 B/ s. J; _0 p
And then go upstairs right away./ q+ {+ k# ~( p9 m: {
+ ?8 }2 q1 {" X. ~& R! v; FFind the answer by using your fingers and eyes $ z& J. X3 y3 q) ?$ g& n这只是一个智力问题,不象是电工问题。
原帖由 老警察 于 2009-1-16 07:12 发表 & m' l8 A. n% y1 n7 b3 ]6 C7 Q/ qTurn on the first for one min and then turn it off.. l" | d' J- n8 c3 v
Turn on the 2nd for five min and then turn it off. 1 W9 O2 ]2 m( q6 k3 wTurn on the 3rd and leave it on. 1 _6 U) r* V1 p( {9 y l7 NAnd then go upstairs right away. ' d' {9 Q. H+ N% L2 }" }# ]+ A* k/ U( D9 Q0 d5 g# }
Find the answer by using ...